<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>嵌套网页</title>
</head>
<body>
    <a href="http://www.baidu.com" target="_blank">
        <img src="//www.baidu.com/img/PCtm_d9c8750bed0b3c7d089fa7d55720d6cf.png" width="200px" height="150px" title="这是百度图片" alt="百度图片"><br>
    </a>
    <iframe src="1.html" width="500px" height="300px" id="1_id" ></iframe>
</body>
</html>